Twin scroll turbocharger with EGR takeoffs

摘要

Systems and methods for operating a twin scroll turbocharged engine with a junction configured to selectively control exhaust gas delivery to an exhaust gas recirculation system and a twin scroll turbine are provided.

主权项

1. A turbocharged engine comprising:
a first scroll and a second scroll fluidically coupled to a turbine, the first scroll coupled to a first set of engine cylinders, the second scroll coupled to a second set of engine cylinders; a first EGR takeoff including a first valve, the first EGR takeoff fluidically coupled to the first scroll; a second EGR takeoff including a second valve, the second EGR takeoff fluidically coupled to the second scroll; an EGR conduit coupled to the first and second EGR takeoffs having an EGR valve positioned therein downstream of both the first and second valves; and a computer readable storage medium having instructions encoded thereon, including:
instructions to, during a first condition close the first and second valves; andinstructions to, during a second condition open the first and second valves.